Home construction - deviation from approved home plan (chaklala cant board)

Hello everyone,

I have approved home plan for 7 marla plot from cantonment board chaklala... However, i want to make some adjustments while construction as those couldn't be made on drawing submitted for approval from ccb due to by-laws. As per law, there is requirement to leave 4 feet open area from at least three sides for 7 marla home plan (doing so will leave nothing left ). I want to utilize back side for washrooms. Can anyone guide me what are the implications if there is violation from approved plan? They will charge me for that or demolish etc?? Please keep in mind, i am talking about chaklala cant board area (rawalpindi).

Thank you